Pondworx Pond Bacteria - Concentrated & Formulated for Large Ponds, Water Features - Safe for Koi - 32ounes & Treats up to a Quarter Acre Pond

Pros: This really works on clearing my 1/3 acre pond. It went from brownish water to crystal clear in about two weeks. No negative impact on the pond in any way. I used a full jug since the pond is about 13 ft at the deepest and averages 6 ft. Cons: The water will start to revert back if you don’t apply again every 2 months.

I have 2,200 Gal pond with eight large KOI's, normally water is kept around 1,600 - 1,800 Gal. There are two 75 Gal wells as primary and secondary mechanical + biological filter as there are Matala filters + 6 Gal of K3 Filter media in there. Both wells are constantly aerated ensure full circulation and to help those bacteria breath a little better. Then another 3500 AquaScape filter + 28W UV and another external 36W UV. For the past 3 years, I've been using Microbe Lift Prof - with a kind of hit and miss result. Hit - during the period where there was less leaves (main culprit is pine needles). Miss - when there were more leaves. As a result, I would have a few weeks of crystal clear water then slowly murky from sludge after 4 weeks . . by the time it hit 6-8 weeks, I must change 30% - 40% of water. Even at this maintenance routine, I began to have green algae growing thicker on all pond walls and water began to turn light green. The foamy gunk is becoming more of an eye soar, . . . I realized that to get out of this cycle, I need to try something different. Having read a lot of reviews, I decided to give Pond Worx a try toward end of April'19. I use a a slightly higher dose than recommended, i.e., first time 16 oz, then 8 - 10 oz. weekly. - First 3 weeks - - I pour Pond Worx in the main part of the pond (where the KOI's are). It does not turn crystal clear yet but it did not get worse either. I review more reviews of Pond Worx and see someone saying the bacteria need good aeration to get better result, so, I gave it a try. - I added Pond Works to the 2 wells instead.Then, turned off the pump and let it sit aerated there for 3-4 hrs (or longer). Then turn on the pump. Within 5 days, the pond became crystal clear. Foamy gunk is still there but much less. I have maintain this weekly routine for another 6 weeks and the water is now crystal clear, algae on the walls are almost gone. So far, from W1 - W9, I did not do any major Water change. Just add more refill to replenish those the evaporated during the the very hot month of June. So far, I'm quite satisfy with this product and about to re-order.

It works but I can not honestly tell you how well. Our pond had a massive algae outbreak and after using an algae control product, we had a lot of muck on the surface and on the bottom of the pond. We put in one gallon a week for 4 weeks and saw a change in the ponds health. It did not harm the large mouth Bass, tilapia or bait fish. I purchased it again to continue the cleanup. One thing it does mention. Algae control products can effect the bacteria so don't use them at the same time.

For a while I used another pond bacteria that was super expensive and not nearly as effective as this stuff. I had an algae bloom in my pond. Since I have started using this once a month in my 2 acre pond, it has not bloomed again! It is also very easy to use. It helps with smelly decay odors, too. I have a lot of ducks and geese that "share" their nitrogen, i.e. poop, so the nitrogen load is an ongoing issue. This product seems to handle that challenge with ease. I am very happy I found this, and such a good price compared to some other stuff out there!

Works great to clear the water but be very careful how much to add if you have goldfish they don’t like this stuff

Product works great and is essential to managing the health of my fishing pond in tandem with the aerator to circulate the later. It breaks down the waste from excess fish food and the resulting fish poop to help prevent algae and weed growth.

Waste of money, it may seem like a good deal, but it makes the water cloudy and I don’t think it works for a Koi pond I believe or it says it’s meant for a pool. The parent company is Sanco industry. It seems like we have to research every single product we buy now because of shady companies trying to steal our money. Well, I’ll be throwing this in trash. My only wish is that Amazon does their homework first before they offer it to sell to the public, but I guess all they care about his profits right Jeff.

I used Pond Worx on our two and a half acre east Kansas pond last August 2022 on the recommendation of pond ecology specialist The Oklahoma Pond Lady Amie Robison. As you can see from the before pic algae and blue green algae were out of control. Our shoreline plants were disappearing and with the heat we were worried about a fish kill. Not to mention that our dog likes to get in the pond and BGA can make animals sick or even kill them. Pond Worx was so easy to use. I just put on knee high boots and waded out at different points around the pond and poured it in. Within a month we started seeing improvement and by the end of two months the results were astonishing. The before and after pictures are from the same spot two months apart and you can see how amazing the difference. This spring the product was still going strong with the water showing a degree of clarity we had not seen in years. This allowed our bass, crappie and bluegill to spawn out in deeper water which saved them from heat stress mortality in our hot dry spring (2023). And our aquatic shoreline plants are back and better than ever. After the big initial dose (eight gallons spread over a month and a half) all we have to do now is put in a jug every month or so while the weather is warm (4-5 months a year around here) to keep the biosystem rolling along so it is very cost effective. If farm or lawn fertilizer run off is causing algal bloom sickness in your pond use Pond Worx to naturally restore balance and complexity to your blue space environment.